Life is like learning a new language. You think you begin to understand it as you face many problems along the way, but you never get it quite well. So life simply means to be satisfied with what one already has.

To sustain. To sustain ones own wellbeing and life. Once you have reached a point where sustaining your own life is no longer the most pressing thing, you can help sustain knowledge, learning, others, pets, income etc. The meaning of life is to sustain.